I think you are significantly overestimating Greene here. He's pitched a really good 19 innings so far this year, but the last 2 years he's been about a mid 3s era reliever in a pitcher friendly park. FIP 3.13, 3.84, 4.61, and now 2.99 this year. Look at the return for Keona Kela last year. Kela is younger, has been more consistent than Greene in a much more hitter friendly environment, and has more team control...and only commanded Hearn and PTBNL. The Kela return is a pretty good template to look at for what Greene might command. That said, the market controls everything. If RH relievers are in short supply, he could command a lot more...or less if they are plentiful.